What was the first Space Shuttle to fly with an all-Navy crew?

The first Space Shuttle to fly with an all-Navy crew was Columbia. This historic mission was STS-1, which launched on April 12, 1981. It marked a significant moment in naval aviation and space exploration history, showcasing the capability and involvement of Navy personnel in space missions. The crew included astronauts who had backgrounds in naval aviation, illustrating the successful transition of military skills to spaceflight. This pioneering flight laid the groundwork for future Navy participation in the Space Shuttle program, emphasizing the importance of naval expertise in space exploration efforts.